Shamus;
Don't mean to beat a dead horse, but I am genuinely interested in how you reach some of the detail on your layout. In the case of the sawmill I can see how you have developed a lot of the detail, but have you fabricated such things as the saw blades and the "sawing machine" in the background yourself?
Sawmills are pretty much in evidence here in southern Missouri where I live in a large area of oak and hickory that runs from eastern Oklahoma, across Missouri into southern Illinois. We actually live very close to the Mark Twain National Forest which encompasses many, many square miles for forest land. (no redwoods, unfortunately!). So there is a great deal of logging that goes on all around us.
One of the most interesting recent developments in the logging industry here is to solve a long time problem in getting rid of all the sawdust generated by the sawmills. The solution is a very simple one, but apparently the technology wasn't there to do it economically until a few years ago. They make charcoal briquets from it. The problem was in dealing with the great amounts of heat generated in the process of making the briquets. I don't understand all the details, but in addition to all the logging trucks we see every day, we also see lots of trucks hauling sawdust to the Kingsford charcoal plant just to the north of us about 20 miles.
Bob